SAD 1 - Assignment 9

USEP's Pre-enrollment System Data Flow Diagrams

Context Data Flow Diagram 

-represents the system as a single process, with all the related entities and the data flows in and out of the system. Since the data stores of the system are conceptually inside the one process, no data stores appear on a context diagram. 

  Current physical Data Flow Diagram

-often show the people and technology used within a system, showing who does what and the media on which data are stored.

 

Current logical Data Flow Diagram

-is a model of the current information system in which the physical aspects of the system are removed as much as possible so that the current system is reduced to its essence, to the data and the processes that transform them, regardless of actual physical form. 

    

New logical Data Flow Diagram

-is a model of the target information system that depicts the functionality and data flows of the target system without regards to how the system will be physically implemented. 

    

Reference:

http://www.interlabs.bradley.edu/uskov/CS403/12_Chapter_7/Chapter_7_WEB.pdf